Mechanical movement.



No. 6s|,s9s. rammed Nav. 13,1900.

o. E. Hmzlarmunsr l MECHANICAL MOVEMENT.

(Application led `IIa-x'. 3, 1900.) (No Model.) 2 Sheets-'Sheet l.

741767' A n AUQHNEY,

Patented Nov. I3', |900.

2 Sheets-Sheet 2.

C. E. HAZELHURST. MECHANICAL MOVEMENT. (Application ined mr. s, 1600.)

No. slss.

(lo Model.)

VNITED STATES PATENT C)PrionQ CHARLES HAZELHURST, OF NORWICI-I, CONNECTICUT, ASSIGNOR OF ONE- 'II-IIRD TO WILLIAM A. BREED AND FREDERIC L. OSGOOD, OF SAME PLACE- MECHANICAL MOVEMENT.

SPEIFICATION forming part of Letters Patent No. 661,693, dated November 13, ieoo.

Application tiled March 3, 1900.

To @ZZ whom, t may concern,.-

Be it known that I, CHARLES E. HAZEL- HURST, a citizen of the United States, residing .at Norwich, in the county of New London and State of Connecticut, have invented certain new and useful Improvements in Mechanical Movements, of which the following is a full, clear, and exact description. y

This invention is in that class of mechanxo ism for converting rotary motion into reciprocatory motion which includes two parallel screws and nutsV adapted to be alternately rocked into engagement with said screws. The object of said invention is to improve 15 the means for rocking said nuts and also to provide a certain independent means of ad-4 justment of the carriage to which the said nuts are secured, as I shall explain in detail hereinafter. Mechanism of this class is valuzo able for use with various kinds of machinerysuch as cutlery-grinding machinery, gear-cutting machinery, and the like-in which it is desired to provide automatic reciprocatory motion. In this present case I have shown my said improvements as applied to cutlerygrinding machinery.

To assist in explaining my invention, the accompanying sheets of drawings have been provided, illustrating the same, as follows:

' 3o Figure l is an elevation of the upper portion of a grinding-machine tted up with the newly-invented mechanism. Fig. 2 is a side elevation of the knife carriage or table and elements immediately related thereto as seen from the right hand of Fig. I. Fig. 3 is a plan view of a table or carriage similar to that shown in Figs. I and 2. Fig. et is a longitudinal sectional view of the carriage of Fig. 3 and also of a bed upon which it travels. 4o Fig. 5 is a plan View of the just-mentioned bed, the work-table being removed therefrom. Fig. 6 shows the table and bed in cross-section and on a somewhat enlarged scale, the said view being taken'on the line 6 6 of Fig. 4 looking toward the left. Fig. 7 embraces two views illustrating the manner of operation of certain elements of the mechanism comprising the newly-improved mechanical movement.

5o Referring to the drawings, the letter a denotes the upper portion ofthe stand of a grind- Serial No. 7,252. (No model.)

ing-machine,and a a bracket secured thereto, supporting bearings b of a shaft c, which latter bears fast and loose pulleys c c2, and at one end, within asuitable casing, (denoted by a2,) the said shaft c bears the usual grinding- Wheel d. The cutlery to be ground is introduced to the face of the grinding-wheel d, and to accomplish this end I suitably secure such cutlery to a horizontally-reciprocating 6o table driven by my newly-invented mechanism and arranged to travel toward and away from the said grindingwheel. My said mechanism is shown as supported by a bracket a3, secured to the frame aand bearing a rectangular block e, extending at right angles to the shaft c and having mounted thereon the above-mentioned table or carriage, (denoted by the letter f.) The table f is adapted to travel upon the block e, and said block and 7o table are respectively provided with ways e' and grooves f', as shown. The block e has a rectangular opening e2 therethrough. which is bridged by two parallel screws g g', journaled in suitable bearings in the end walls of the opening e2 and bearing, respectively, gears 71, h adjacent to the outer face of one end of the block e, which said gears are in mesh with each other and the former of which is in mesh also with a spur-gear h2, 8o mounted upon a stud h3, projecting from said end Wall, the gear h2 having secured thereto one of a pair of miter-gears h4, the companion gear of said pair being mounted upon a shaft 7c, having bearings lo secured to the S5 block e and bearing a driving-pulley k2. Upon the revolution of the driving-pulley 7.02 motion is imparted from its shaft 7c through the pair of bevel-gears h4 to the spur-gear h2 and from the latter to the gear h and thegear 9o 71,', resulting in revolving the screws g g in opposite directions.

Depending from the under side of the table f (or rather from a block f2, adjustably secured to the said table, as hereinafter described) are two downwardly-projecting portions fs, which enter the opening e2 of the bed e and have pivotally secured between them that which I term a clutch-bar n. The clutch-bar fn is pivotally supported midway its length and extends at right angles to the table f, and the opposite ends have tapped chiese portions (substantially like the half-section ot"a nut) adapted to engage, respectively, the screws g g.

By reference to Figs. 5 and 6 it will be seen that when either tapped end of the bar n is in engagement with its adjacent screw g or g/ the said end is held in such engagement by the projections n n2, which engage, respectively, the upper and under faces of the strips o and o in the manner shown in the drawings, and it will be understood that when thus in engagement the rotation of the engaged screw will cause the clutch-bar. to travel thereon. Assuming the elements under consideration to be, respectively, in the positions shown in Fig. 5 and the clutch-bar-engaging screw g to be traveling in the direction of the arrow, it will be seen that when the position shown in dotted lines in the said figure is reached the projections n n2 Will have traveled'from engagement with the strips o o. When the clutch-bar 'a reaches the position just mentioned, the same may be rocked u .pon its supporting-pin to cause the end ofthe bar adjacent the screw g to engage the last-named screw, which, itw'ill be remembered, revolves in the direction the reverse to that of the screw g', and therefore eects the driving of the carriage in the opposite direction to that indicated by the arrow of Fig. 5. It will now be seen that by rocking the clutch-bar fn upon the completion of the travel of the carriage in either direction to cause it to leave the screw serving to actu-ate the carriage in said direction and to engage the companion screw the said carria ge will be caused to travel with a reciprocating motion.

In connection with the clutch-bar n automatically-acting mechanism is provided f or rocking the said clutch-bar upon the completion of the travel of the carriage in eitherdi rection, which mechanism I will now proceed to describe. Located in the rectangular opening e2 of the block e near each end of the said opening are blocks p, having stem portions p', which enter theend walls of the opening e2 and serve to support their respective blocks in position. accidental displacement and to prevent rotation of the stemsp, set-screws p2 are located in the block e, the inner ends of which screws engage flattened faces provided on the stems p. Each blockp supports a vertical rod s., which is capable of longitudinal movement in the said block, butis prevented from rotation by means of a set-screwp3, which screw is located in the block and the inner end ofv which engages the rod s. The rod s is. provided with ahead portion s', having journaled in bearings formed thereon a small wheel or roll t. The letter t denotes a spring which encircles the rod s and the opposite ends of which engage, respectively, the said head t and the block p. The rolls t lie` normally in`r the path of the clutch-bar n, and when the latter istravelin g in a given direction the end: of said bar that is in engagement with its To retain the blocks p againstl screw g or g', as the case may be, comes into contact with the roll t just prior to the traveling of the clu tch-bar from engagement with the strips o o.

Referring now particularly to Figs. 5 and 6, in which it is assumed that the clutchbar travelingin the direction of vthe arrow of Fig. 5 has just come into engagement with the roll t adjacent th'e screw g", continued travel of the clutch-bar n in the direction indic-ated then serves to force the roll t downward, the latter riding upon an inclined face ns, provided in the clutch-bar, as will be readily understood by reference to the right-hand diagram of Fig. 7. The downward travel of the roll t effects the compression of the spring t' and is continued until the said roll isbeneath the clutch-bar,- as shown in dotted lines in said Fig. 7. The just-mentioned positionsof theL clntch-barand roll are reached substantially simultaneously with the traveling-of the b arfrom engagement with the strip 0. or 0, and when thns disengaged the spring t' at once acts by expansion to force the roll t upward, and thereby effects the rocking of the clutch-bar n from engagement with the screw g' intolv engagement with the screw g, as will be understood by reference to Fig. 7 and as shown in Fig. 6, the said bar having been rocked'from the position shown in dotted lgines in the last-.named figure. to that show-n in full lines.` The roll.l engaging the clutch-.bar in the. manner shown in Fig. 6, serves to retain the said clutch-bar in engagement with the screw g until the latter, actu- @Ding tit@` clutch-barro travel i111` the direction the reverse to. that, indicated bythe arrow of Fig.L 5 has caused said clutch-bar to again 3 engage the strips o o, which latter `serve to retain the. clutch-bar in engagement with the lblef, but rather on a rectangular block f2,

adjustably secured to the said table. The block f2 is located in a rectangular opening f3 in thetable f and is capable of limited endwisemovementin said opening. To retain the block f2 in position, the table f is bored and tapped from each end into the opening f3 to receive screws f4, the ends of which are shouldered; down and enter the oppositel ends of the block f2, as will be seen i-n Fig. `3. Upon properly manipulating the screws` f4 the block f2 may be moved, in the table f, thus allowingthe table f to be adjusted relatively tothe clutch-.bar n, carriedv by the said block f2, or the said screwsmay be withdrawn IOS 'sufcien tly to permit the removal of the block in order that the interior mechanism of the device may be readily assembled or disassembled.

When my newly invented mechanical movement is applied to cutlery-grinding machinery, as shown in Figs. l and 2, a knife u is secured to the side of the carriage f, substantially as shown in Fig. 2, and the driving mechanism is so arranged as to cause the carriage to carry the knife into engagement with the emery-wheel d, the position of the said knife and the extent of travel of the carriage being such that the knife-blade will be ground from its outer end to the bolster.

While I have shown and described two of the strips o o', I do not wish to confine myself to such construction, as it will be apparent that when the clutch-bar projections n n2 are adapted to engage both the upper and lower faces of the strips o 0' only one such strip is necessary to the successful working of the described mechanism.

It will of course be apparent that the screws g g' need not necessarily be geared together and whether geared together or not that they revolve at the same speed, as it will be seen that they could revolve at diiferent speeds and thus cause the carriage to travel rapidly in one direction and more slowly in the opposite direction, a very desirable feature when my device is utilized with a certain class of machinery. It will also be seen that it is not necessary to the successful working of my invention that the screws g g' and the mechanism for operating the clutch-bar and fo'r holding the same in engagement with said screws be located in the stationary bed or elementof the device and the said clutch-bar be carried by the carriage or moving element, as a reversal of this construction would operate equally well.

Having now described my invention, I claiml. The combination with two screws, a rock; ing beam provided with nuts adapted to alternately engage said screws, and having inclined surfaces n3 asset forth, means for revolving said screws, and means for rocking the said beam consisting of spring-actuated rolls 15 located in the path of the said inclined surfaces.

2. In combination, a fixed bed, a carriage, a plate f2 adjustably mounted on said carriage, two screws revolubly mounted in the said bed, a rocking beam fulcrumed in said plate f2 and having nuts adapted to engage the screws as set forth, and means, consisting of spring-actuated rolls lying in the path of the said beam, for rocking the latter to cause the said nuts to alternately engage the said screws.

Signed 'at Norwich, Connecticut, this 21st day of February, 1900.

CHARLES E. HAZELHURST. Witnesses: y

ALoNzo M. LUTHER, FRANK H. ALLEN. 

